:: Igo Hatsuyôron 120 (2021)

Variations of Our Solution (Ib)

KataGo's 2021 Solution

VAR (.3) (.3)

: ( 58bm)
Black defends in the left centre.

:
White's hane at the upper edge takes profit outside the Main Semeai area.

:
Black protects his upper left corner.

:
White's push at the left edge destroys two points of Black's territory, without losing any tempo in the Main Semeai.

:
The Main Semeai continues.

Black plays 2/2 reductions.

Before the end of the game, Black will have to defend at .

Capture Variation:

Compared to the superordinate variation, ...

  • White's cumulated gain at the upper edge is two points.
  • Black got an additional point of territory in the right centre.
  • White did not capture Black's stone in the lower right, so losing two points.

In total, Black gained one point.

White + 2 => White + 1

Semeai Variation:

Compared to the superordinate variation, ...

  • White's cumulated gain at the upper edge is two points.
  • Black got an additional point of territory in the right centre.
  • Black captured one White stone less in the left centre, so losing two points.
  • White captured one Black stone more in the lower left, so gaining two points.

In total, Black lost five points.

Black + 8 => Black + 3

Copyright © 2021 Thomas Redecker.

Design by Jan van Rongen, modified by Thomas Redecker.

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